All in a single Mesh : This will import the whole cache in a single mesh. It is faster to process, but there won't be any shader information on this mode, only raw geometry

One mesh per entity & asset : This mode is slower, and will split the scene into each mesh asset as it would be done on an equivalent FBX or alembic import. If the shaders are present, they will be linked. Note that this mode is closer to what our renderer plugins : the instances & shaders can only be handled correctly by doing so.